Data Aire DAFC-11 Manual de instalación descargar pdf (Pagina 21)

NOTE: Charging to a full liquid line sight-glass should never be the sole means of de-

termining the correct refrigerant charge. Other parameters such as superheat, suction

pressure, head pressure, sub-cooling and ambient temperature are also important. A

system charged to a clear sight-glass is often overcharged.

4.3.2 Factory Charge for Water/Glycol Cooled Systems

Evaporator Model R-407C R-410A

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*W = Water Cooled G = Glycol Cooled

4.4 Refrigerant Handling

The use of recovery/recycling is required by the US Environmental Protection Agency (EPA) regu-

lations. Technicians who service and dispose of air conditioning and refrigeration equipment must

recover the refrigerant instead of venting to the atmosphere.

Except for extremely small releases of refrigerant such as those that occur when disconnecting

service hoses (diminutive release), a technician who knowing releases or vents refrigerant to the

atmosphere is in violation of these regulations. Freon purchasers must be certiﬁ ed technicians and

have a valid EPA certiﬁ cation card.

4.5 Important Refrigeration Components

4.5.1 Expansion Valve

Each refrigerant circuit has an adjustable thermo-expansion valve (TXV). They are factory adjusted

to their nominal rating. Any ﬁ eld adjustment should be to “ﬁ ne tune” a system that has been stabi-

lized and already has acceptable operating parameters.

4.5.2 High Pressure Cutout Switch

Each refrigeration circuit is protected by a high head pressure cutout switch with a manual reset

button. The switch is located near the compressor.

The pressure rating for R-407C systems is 450 PSIG.

The pressure rating for R-410A systems is 575 PSIG.

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Data Aire DAFC-11 Manual de instalación Pagina 21